122668891 has 8 divisors (see below), whose sum is σ = 126823424. Its totient is φ = 118526760.

The previous prime is 122668877. The next prime is 122668907. The reversal of 122668891 is 198866221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122668891 - 2¹⁵ = 122636123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122668831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19816 + ... + 25258.

It is an arithmetic number, because the mean of its divisors is an integer number (15852928).

Almost surely, 2^122668891 is an apocalyptic number.

122668891 is the 6395-th hex number.

122668891 is a deficient number, since it is larger than the sum of its proper divisors (4154533).

122668891 is an equidigital number, since it uses as much as digits as its factorization.

122668891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6201.

The product of its digits is 82944, while the sum is 43.

The square root of 122668891 is about 11075.5989002853. The cubic root of 122668891 is about 496.8723308323.

The spelling of 122668891 in words is "one hundred twenty-two million, six hundred sixty-eight thousand, eight hundred ninety-one".